TWO POSITION SWITCH FOR LB/ DELTA 2 CHARGING.

Mtbcol

Mtbcol

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Hello all. While I give my brain a rest from trying to sort out the number plate/ rear side light fault I thought I starving my two position switch project.

Its to switch over from the solar panel charging the leisure battery when full, to the DELTA2 unit. This will be a temporary solution until we have the funds and time to sort out our proper lithium battery installation.

So first question is. Can I link the negatives together or must they all be separate? Not sure if I've explained that very well?

What I will have is: pos and neg from the solar panel breaker, pos and neg from the mppt ( solar output ), and pos and neg from the delta 2 charge input. The idea is to use the switch to change between the solar breaker and the DELTA2 or the mppt. At the moment I have to get under the table and swap the mc4 connectors from one to the other.

Hope I've explained that better 🤔😁

Picture of the two way switch I've got.
 

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Does the switch not have + and - connections for input, output 1 and output 2?

Wait for someone with better knowledge but I would say you need 2 connections each position
 
Thanks Nabsim, I've literally just had it delivered and not had the back off yet , as cold beers was calling😁🍻
 
You'd almost certainly be able to link all the negatives and switch only the positives BUT I bet you've already got negatives coming back from all three items so you may as well switch the negatives as well.
You need a double pole double throw switch, often called a double pole changeover switch, I think the one in your picture has more than enough options but it depends on what's on the rear.
Do you have a diagram of the layout of the connections of the switch or a truth table? If you do I can talk you through it bomb disposal style.
 
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That would be great Merl. I'll probably do it tomorrow if your still up for it as I may well have had too many cold beers at the moment 🤪🤪🍻😁
 
Mtbcol said:
That would be great Merl. I'll probably do it tomorrow if your still up for it as I may well have had too many cold beers at the moment 🤪🤪🍻😁
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I'm dead busy tomorrow morning (according to Kim anyway) getting jobs done before it gets too hot. But if you have a skin full tonight it'll take you till lunchtime before you're active anyway 😉.
I'll need a switch contact table and I'll need to know if you want the ecoflow to be No1 or No2..
You'll need a dozen suitable ring terminals, a crimper and 2 short bits of cable to make up a pair of links at the back of the switch.
 
MERL said:
I'm dead busy tomorrow morning (according to Kim anyway) getting jobs done before it gets too hot. But if you have a skin full tonight it'll take you till lunchtime before you're active anyway 😉.
I'll need a switch contact table and I'll need to know if you want the ecoflow to be No1 or No2..
You'll need a dozen suitable ring terminals, a crimper and 2 short bits of cable to make up a pair of links at the back of the switch.
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Sorted, thanks Merl 👍
 
@MERL one of the 2 outputs will be going to charge a power bank. I can't see how it would work if you linked all negatives in this application. What am I missing or did you not know one output was power bank?
 
My thoughts were. You'd only be connecting the negatives in common and the power bank doesn't share any other point of reference with any other piece of apparatus apart from the solar panel which only gets connected to the input and nothing else. so it would be impossible for any unwanted current to flow. A bit like a bird sitting on a high voltage cable, with just a single point of reference no current can flow through the bird.
Rather a mute point anyway Neil cos Colin's going to switch the negatives anyway it's just as easy.
 
YeoBlade said:
the switch looks identical to the one I used to switch over from EHU to inverter supply.
May need a couple of links to change over solar inputs
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Yes, Colin's was the same with identical switching Julian. I nearly fitted one to Rob's van to give him the option of series/paralell or off for his solar panels but we decided not to bother in the end. They have a very decent rating for both voltage and current...quite impressive for the money.
 
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